Brush



Oct. 4, 1932. l. F. DITTMAR BRUSH Filed May 28, 1880 31a/venten PatentedOct. 4, '1932 UNITED STA-'res PATEN IRVIN F. DITTMAR, OF WILLIAMSPORT,PENNSYLVANIA, ASSIGNORTO THE CROMAR C0.,

OF VILLIAMSPORT, PENNSYLVANIA,

A CORPORATION OF PENNSYLVANIA BRUSH Application filed May 28,

This invention relates to certain new and useful'improvements in brushconstruction and method of making the same and more particularly to themethod of making a brush with a hollow center in order to produce afountain brush especially adapt-ed to be used in machines for coatingstrips of iooring, the object being to provide a method by means ofwhich a brush with a hollow center can be made which will be very strongand durable,

v a ferrule being embedded within the bristles appended claims.

ofthe brush to receive the nozzle for supplying liquid thereto.-

Another object of my invention is to provide a brush with a sectionalback formed of two tclescoping sections between which are arranged thebristles which are secured therein under pressure by cement in such amanner that all danger of the bristles working out is prevented.

Another object of my invention is to provide a brush with means forreinforcing the bristles to each side of the opening formed therein toreceive ,the nozzle.

Other and further objects and advantages of the invention will behereinafter set forth and the novel features thereof deiined by the Inthe drawing` Figure lis a plan view of a blank from which one'of thesectional back members is formed;

Figure 2 is a perspective view of one of the sections of the back;

Figure 3 shows the first method of dipping the ends of the bristles intoa cement in order to allow the bristles to absorb the cement;

Figure 4t is a section through a bunch of bristles with a cone insertedtherein in order to form a hollow within the bristles;

Figure 5 is a vertical section through a form with the sectional backsin position therein and the bristles being placed therem;

'Figure 6 shows the sectional backs pressed together so as to securelyclamp the bristles in the back; and

Figure 7 is a perspective view of the back of the brush constructed inaccordance with my improved method.

1930. Serial No. 456,408.

In constructing a brush in accordance with Y my invention, I employ apair of back members A constructed identically alike of sheet `metal,such asprime coke tin, each back section being formed of a blank B asshown in Figure l which is bent on the dotted lines B, BZVand B3 intothe shape as shown in Figure 2 which provides a box-like back sectioncomposed of double bottom portions A, A2 and inwardly projectingreinforcing portions A3 and as these sections are formed of flexiblemetal7 they'are adapted to telescope one within the other by bendinginwardly the end walls A4 of one back section so as to allow it totelescope within the other back section, the bottom section A2 beingnotched as shown at A5 whereby an opening will be formed in theV back ofthe complete brush when the twosections have been forced together andsecured as shown in Figure 7 through which Vcan pass a supply nozzle.

The method of forming a brush is as follows;

A pair of sectional backs are placed in a rectangular form C which isprovided with pressing members Doperated by screws D. These sections arearranged within the form C in expanded position over a centering plug Emounted inthe form and over which is placed Y a ferrule F which isprovided with an annular '80 Hange F cut away as shown at F2 to preventthe same from rotating'or moving therein. The ferrule is provided with athreaded portion F3. through which a threaded nipple is f adapted topass for moving the brush towards S5 and away from thestrip to becoated.

A bunch. of bristles G of the desired size is 'selected and thestringusually employed for tying the bundle is removed and a rubber band H isplaced around the bristles and the bristles' are then placed in areceptacle I containing a cement J formed ofrpowdered -1 magnesite andliquid chloride in order to bristles beyond the line of cement into theuncemented end of the bristles.

The cement from thel receptacle I is then poured into the box-likesectional back which has been arranged within the form C and the bunchof bristles with the cone K therein is inserted into the box-likemember, the cone extending over the ferrule so as to protect the sameand to allow a hollow place to be formed within the bundle ofthebristles. i

`be moved inwardly,rhavebeen reached, which forces the two `sectionstogether, causing one section to telescope within the other, thereinforcing members moving inwardly towards each 'other'so as toreinforce the bristles around the opening thus formed. The form is thenturned upside down and vibrated so as to shake off the surpluscementrwhich has been squeezedout andthe formA is then placed upsidedown in a-heated room or over a steam radiator and after remaining in awarm place kfor twenty-four hours, a suitable instrument is forced downthrough the brush and theplug E is driven out through the bottom of theform and then the pressure screws are unscrewed soas to release thebrush thus formed, which is removed from the form and the outside of thebrush is thoroughly cleaned with a wire brush and the bristles combedwith a brush- -makers comb and all projecting bristles are cut off. Thejoints of the twosectional backs which are held infthis position by thecement are then cleaned and soldered as shown at L in FIigure 7 and thebrush thus formed is comp ete;l c Y By this method a brush can be formedwith a hollow portion to receive a supply nozzle locatedcentrally or atany desired position and in the embodiment of my'invention as hereinshown the'ferrule embedded lwithin the' brush to receive the liquidsupply nozzle isv arranged off-center so that when the brush by Iproduce a brush which has many ad- A 4 double bottom telescoping backsections secured around one end of a bunch of bristles,

Va ferrule arranged within said back and eX- tending into said bristles,said back being provided with oppositely disposed inwardly proj ectngreinforcing members extending into said bristles to each side of saidferrule.

2. A brush composed of a back formed of two box-like sections havingdouble bottom portions, said sections being adapted to telescope onewith-in the other, bristlesv disposed in said back and secured thereinby cement, said box-like sections lbeing secured together around saidbristles.

3. As a new article of manufacture, a brush having a back formed ofduplicate box-like sections, the bottomA of each section Vbeing formeddouble, one section being adapted to telescope within the other'section, bristles secured within said back and a ferrule embedded withinsaid bristles adapted to receive a supply nozzler Y 4. As a new articleof manufacture, a brush formed of a pair of rectangular box-likesections, each section'having a doublebottom, one bottom of each sectionbeing provided with a notch,l saidv sections adapted to telefscopewithin oneV another, a ferrule arranged within the notches of` saidsections, bristles disposed in said sectionsv and: members extendinginwardly from each section tov each side of said ferrule.

In testimony whereof I hereunto aix my signature.A Y l c Y IRVIN F.DITTMAR.`

is used in connection with amachinekv for coat- Y formed by placing thebristles around a fer- .f

rule to form a receiving opening for the nozzle used for supplyingLliquid thereto where-

